Black Spots On Rose Leaves

My roses with black spots on its leaves – it is harmful and what should I do?

Sounds like it could be black spot (actually) is a fungus: Diplocarpon pityriasis appropriate action to take: 1 rake) and discard all fallen leaves, because they are the main source of spores in the spring. 2) Also prune and discard any obviously infected canes. 3) Avoid wetting the foliage dark especially on cloudy days. 3) Growing plants in an open and sunny to promote rapid drying of leaves. 4) No plant and avoid dense planting windbreaks to allow good air circulation. 5) The roses vary resistance to this disease. The use of resistant varieties for low maintenance plantings. 6) Remove infected leaves that may arise early in the season can help slow the rate of spread of the disease. 7) There are several fungicides registered for control of black spot due to the nature of wax with rose petals, a spreader aggregate to give a better spray coverage. If you anticipate humidity, dew preventitivly fungicide with a list of roses. If the infection is enough serious, nmay have to dig the pink, discard and plant a resistant variety. When pruning an infected person rose, always disinfect your mower blades between cuts. Hot and humid climate contribute to the disease. Contact your local Cooperative Extension office and ask to speak with a Master Gardener. That will be the best source of local information.

Growing Roses : How to Control Black Spot on Roses

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